GB687146A - Improvements relating to electrodes and to processes for their manufacture - Google Patents
Improvements relating to electrodes and to processes for their manufactureInfo
- Publication number
- GB687146A GB687146A GB27810/49A GB2781049A GB687146A GB 687146 A GB687146 A GB 687146A GB 27810/49 A GB27810/49 A GB 27810/49A GB 2781049 A GB2781049 A GB 2781049A GB 687146 A GB687146 A GB 687146A
- Authority
- GB
- United Kingdom
- Prior art keywords
- reactivity
- furnace
- precalcined
- dry substance
- binder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
- C25C3/08—Cell construction, e.g. bottoms, walls, cathodes
- C25C3/12—Anodes
- C25C3/125—Anodes based on carbon
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
- C25B11/04—Electrodes; Manufacture thereof not otherwise provided for characterised by the material
- C25B11/042—Electrodes formed of a single material
- C25B11/043—Carbon, e.g. diamond or graphene
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
- C25B11/04—Electrodes; Manufacture thereof not otherwise provided for characterised by the material
- C25B11/042—Electrodes formed of a single material
- C25B11/043—Carbon, e.g. diamond or graphene
- C25B11/044—Impregnation of carbon
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B7/00—Heating by electric discharge
- H05B7/02—Details
- H05B7/06—Electrodes
- H05B7/08—Electrodes non-consumable
- H05B7/085—Electrodes non-consumable mainly consisting of carbon
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Electrolytic Production Of Metals (AREA)
- Electrodes For Compound Or Non-Metal Manufacture (AREA)
Abstract
In the production and use of self-baking electrodes of the Söderburg type, particularly in the electrolytic production of aluminium, wherein a paste comprising a dry substance such as calcined coke or anthracite mixed with a binder containing hydrocarbons such as tar or pitch, is fed to a furnace at temperatures below graphitization temperatures, thereby becoming baked and continuously renewed as it is used, the process is characterized in that the dry substance, before the addition of the binder, is calcined to a predetermined extent such that its reactivity, as hereinafter defined, and that of the coke obtained from the binder reach the same value in that part of the electrode in contact with the molten contents of the bath. Reactivity is defined as log <FORM:0687146/III/1> where a is the rate of flow of carbon dioxide passed into a silica tube containing the coke heated to 950 DEG C and b is the rate of flow of the unreduced carbon dioxide leaving the tube. The dry substance may be precalcined for a prolonged period at the same temperature as that of the furnace, the reactivity then reaching a substantially constant value, or it may be precalcined at a higher temperature for a shorter time, subsequent heating at the temperature of the furnace during operation having no further effect on the reactivity. Thus in an aluminium furnace operating at 950 DEG C the dry substance may be precalcined at 950 DEG C for 10 to 20 hours or precalcined at 1100 DEG C for 1/8 -hour, whereafter subsequent baking in the furnace at 950 DEG C leaves the reactivity unchanged.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO169326X | 1948-11-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB687146A true GB687146A (en) | 1953-02-11 |
Family
ID=19904601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB27810/49A Expired GB687146A (en) | 1948-11-20 | 1949-10-31 | Improvements relating to electrodes and to processes for their manufacture |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US2653878A (en) |
| AT (1) | AT169326B (en) |
| BE (1) | BE491391A (en) |
| CH (1) | CH280174A (en) |
| DE (1) | DE840921C (en) |
| FR (1) | FR997122A (en) |
| GB (1) | GB687146A (en) |
| SE (1) | SE137425C1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008115727A1 (en) * | 2007-03-16 | 2008-09-25 | Alcoa Inc. | Systems and methods for producing carbonaceous pastes used in the production of carbon electrodes |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3124471A (en) * | 1964-03-10 | Basic patching material for rotatable | ||
| US3050451A (en) * | 1962-08-21 | Process for the preparation of carbon | ||
| US2764530A (en) * | 1952-10-06 | 1956-09-25 | Research Corp | Producing low resistivity carbon for electrodes |
| US2998375A (en) * | 1953-01-06 | 1961-08-29 | Kaiser Aluminium Chem Corp | Electrode of carbon material from bituminous coal and method of making the same |
| US3009863A (en) * | 1957-04-24 | 1961-11-21 | Aluminum Co Of America | Methods for thermally processing carbon articles |
| US2989408A (en) * | 1958-10-24 | 1961-06-20 | Union Carbide Corp | Method and mix composition for producing oxidation resistant carbon articles |
| ES255332A1 (en) * | 1959-02-23 | 1960-04-16 | Elektrokemisk As | Process of producing carbon electrodes |
| US3025229A (en) * | 1959-06-03 | 1962-03-13 | Kaiser Aluminium Chem Corp | Improvements in the method of making carbon anodes |
| US3320150A (en) * | 1963-09-06 | 1967-05-16 | Exxon Research Engineering Co | Molded carbon materials |
| US3853793A (en) * | 1972-01-07 | 1974-12-10 | Alcan Res & Dev | Production of carbon electrodes |
| JPS57117585A (en) * | 1980-12-30 | 1982-07-22 | Standard Oil Co | Reduction of carboxy reactivity of coke |
| US4808354A (en) * | 1987-06-22 | 1989-02-28 | International Fuel Cells Corporation | Method of making electrical discharge machining electrodes |
| US4784733A (en) * | 1987-11-23 | 1988-11-15 | Reynolds Metals Company | Recycling of spent potliner |
| EP2953999A1 (en) * | 2013-02-05 | 2015-12-16 | SGL Carbon SE | Rigid polystyrene foams |
| RU2671023C1 (en) * | 2017-09-08 | 2018-10-29 | Общество с ограниченной ответственностью "Объединенная Компания РУСАЛ Инженерно-технологический центр" | Anode mass production method for the aluminum cell self-baking anode |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1317497A (en) * | 1919-09-30 | Graphitized electrode and process of making the same | ||
| US655920A (en) * | 1899-12-16 | 1900-08-14 | Henry A Kaufhold | Manufacture of carbon. |
| US887123A (en) * | 1907-12-26 | 1908-05-12 | Edgar F Price | Electrode for electric furnaces and process of making the same. |
| NL15605C (en) * | 1923-07-25 |
-
1949
- 1949-09-27 CH CH280174D patent/CH280174A/en unknown
- 1949-09-28 BE BE491391D patent/BE491391A/xx unknown
- 1949-10-03 SE SE856449A patent/SE137425C1/sv unknown
- 1949-10-07 AT AT169326D patent/AT169326B/en active
- 1949-10-11 FR FR997122D patent/FR997122A/en not_active Expired
- 1949-10-21 DE DEE79A patent/DE840921C/en not_active Expired
- 1949-10-31 GB GB27810/49A patent/GB687146A/en not_active Expired
- 1949-11-18 US US128252A patent/US2653878A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008115727A1 (en) * | 2007-03-16 | 2008-09-25 | Alcoa Inc. | Systems and methods for producing carbonaceous pastes used in the production of carbon electrodes |
Also Published As
| Publication number | Publication date |
|---|---|
| CH280174A (en) | 1952-01-15 |
| FR997122A (en) | 1952-01-02 |
| BE491391A (en) | 1949-10-15 |
| US2653878A (en) | 1953-09-29 |
| AT169326B (en) | 1951-11-10 |
| DE840921C (en) | 1952-06-09 |
| SE137425C1 (en) | 1952-09-23 |
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